I think you're overestimating Pakistan's capability. It gave Taliban leaders shelter at their worst moment, and that is about the only leverage ISI had.
The moment Taliban started to carve out territory inside Afghanistan, that leverage was gone. There's some gratitude, but also lots of resentment among Taliban leadership about the way they were treated by the Pakistani authority.
The moment Taliban started to carve out territory inside Afghanistan, that leverage was gone. There's some gratitude, but also lots of resentment among Taliban leadership about the way they were treated by the Pakistani authority.